Antihydrogen is the antimatter counterpart of hydrogen. Whereas the common hydrogen atom is composed of an electron and proton, the antihydrogen atom is made up of a positron and antiproton.
The standard symbol for antihydrogen is H that is, H with an overbar (pronounced /ˌeɪtʃ ˈbɑr/ aitch-bar).
Subject: Antihydrogen 
Sat Nov 20, 2010 1:07 am
